Crossfire 2 dual GPU graphics cards

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Crossfire 2 dual GPU graphics cards

Postby Zaileion » Mon Jul 20, 2015 3:42 pm

Im trying to Crossfire 2 radeon 7990's, essentially Quadfire. Your instructions from viewtopic.php?f=7&t=2336 worked perfectly but only for Device 0,1

Im not sure if this is crossfiring both GPU's in the primary graphics card leaving the secondary graphics card not crossfired or, crossfiring the 1st GPU of each graphics card leaving the 2nd GPUs on both primary and secondary cards not crossfired.

I know the Crossfire cable is working, and the cards are properly seated in the PCI slots because in Windows(R) everything works.

Side Note: No usual output from this command:

Code: Select all
$ glxinfo | grep direct-rendering
$

Should say: direct-rendering: yes (or something like that)

Here are some commands i've used:

1.
Code: Select all
$ aticonfig --lsch

Multiple GPU chain for adapter 0, status: Crossfire is enabled
  0. 05:00.0 AMD Radeon HD 7900 Series 
1. 06:00.0 AMD Radeon HD 7900 Series 


Code: Select all
$ aticonfig --list-adapters
* 0. 05:00.0 AMD Radeon HD 7900 Series 
  1. 06:00.0 AMD Radeon HD 7900 Series 
  2. 09:00.0 AMD Radeon HD 7900 Series 
  3. 0a:00.0 AMD Radeon HD 7900 Series 

* - Default adapter


I can get Crossifre on all 4 GPU's by doing the following but after reboot I get the result in Code # 1.

If I:

2.
Code: Select all
$ sudo aticonfig --adapter=all --cfa
[sudo] password for zaileion:
No layout section was found in the file: '/etc/X11/xorg.conf'.
Please run 'aticonfig --initial' first or modify your configuration file manually and run aticonfig again.
aticonfig: parsing the command-line failed.


So..

3.
Code: Select all
$ sudo amdconfig --initial -f --adapter=all
Uninitialised file found, configuring.
Using /etc/X11/xorg.conf
Saving back-up to /etc/X11/xorg.conf.original-1


** Notice: Saving back-up to /etc/X11/xorg.conf.original-1 above. I “rm” the backups after every few, otherwise it would be in the dozens... Ive been trying and trying..

Then I:


4.
Code: Select all
$ sudo aticonfig --adapter=all --cfa
Multiple GPU chain added
Warning: X needs to be restarted before MGPU changes take effect.

And:

5.
Code: Select all
$ sudo aticonfig --adapter=all --crossfire=on
Crossfire chain(s) enabled
CrossFire does not support on this platform
Warning: X needs to be restarted before CrossFire changes take effect.




Result NO Restart:

Code: Select all
$ aticonfig --lsch

Multiple GPU chain for adapter 0, status: Crossfire is enabled
  0. 05:00.0 AMD Radeon HD 7900 Series 
  1. 06:00.0 AMD Radeon HD 7900 Series 
  2. 09:00.0 AMD Radeon HD 7900 Series 
3. 0a:00.0 AMD Radeon HD 7900 Series


Notice 0,1 are 05:00.0, 06:00.0 & 2,3 are 09:00.0, 0a:00.0 Anyone know what that means?

And then there is this command I'm not sure what it means:

Code: Select all
$ aticonfig --lscs
    Candidate Combination:
    Master: 5:0:0
    Slave: 6:0:0
    CrossFire is disabled on current device
    CrossFire Diagnostics:
    CrossFire can work with P2P mapping through GART
    Dongle Capabilities: support PASSTHROUGH |INTERLINK_SW_AFR | INTERLINK_AUTO_AFR | INTERLINK_BLACKING | INTERLINK_SUPERAA
    Candidate Combination:
    Master: 5:0:0
    Slave: 6:0:0
    CrossFire is disabled on current device
    CrossFire Diagnostics:
    CrossFire can work with P2P mapping through GART
    Dongle Capabilities: support PASSTHROUGH |INTERLINK_SW_AFR | INTERLINK_AUTO_AFR | INTERLINK_BLACKING | INTERLINK_SUPERAA
    Candidate Combination:
    Master: 5:0:0
    Slave: 6:0:0
    CrossFire is disabled on current device
    CrossFire Diagnostics:
    CrossFire can work with P2P mapping through GART
    Dongle Capabilities: support PASSTHROUGH |INTERLINK_SW_AFR | INTERLINK_AUTO_AFR | INTERLINK_BLACKING | INTERLINK_SUPERAA
    Candidate Combination:
    Master: 5:0:0
    Slave: 6:0:0
    CrossFire is disabled on current device
    CrossFire Diagnostics:
    CrossFire can work with P2P mapping through GART
    Dongle Capabilities: support PASSTHROUGH |INTERLINK_SW_AFR | INTERLINK_AUTO_AFR | INTERLINK_BLACKING | INTERLINK_SUPERAA

If I restart I get the same thing as # 1. above

I've tried different combinations of “sudo aticonfig –adapter=all....” replacing “all” with “1,2” or “2,3” and finished the instructions with the corresponding adjustments to the commands thus having to “rm” the backups of the xorg.conf.

No matter what when I restart I get the result in Code # 1 after a restart.

Just wanted to say that your crossfire instructions work for me, i've tried several others sites but their not thorough or are incorrect. Ultimate Edition for some reason has provided the most solid instructions and the highest level of success for technical issues that have little or minimal documentation elsewhere. I post similar questions on several sites if I cant find any successful instructions after a thorough search and the results on Ultimate Edition have yielded the best results. Thank you for providing your time.
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Ultimate Edition 3.5.2 (LTS) / Windows 7 Ultimate
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Zaileion
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